The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 10, 1993
Filed:
Oct. 11, 1991
Applicant:
Inventor:
Teruya Tanaka, Yokohama, JP;
Assignee:
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D06F / ;
U.S. Cl.
CPC ...
68 1204 ;
Abstract
Disclosed is a washing machine which comprises a DC brushless motor to drive a pulsator, an inverter circuit to generate outputs to drive the DC brushless motor by periodically switching input DC voltages with a switching device, an inverter controlling circuit for adjusting outputs of the inverter circuit by controlling the switching operation of the switching device in the inverter circuit, and a detecting mechanism for detecting laundry amount based on a rotating speed of the DC brushless motor and an inverter current flowing through the inverter circuit with the switching device under a constantly controlled state.